163886656637 has 16 divisors (see below), whose sum is σ = 182540252160. Its totient is φ = 145878990000.

The previous prime is 163886656631. The next prime is 163886656651. The reversal of 163886656637 is 736656688361.

It is a cyclic number.

It is not a de Polignac number, because 163886656637 - 2¹⁰ = 163886655613 is a prime.

It is a super-2 number, since 2×163886656637² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163886656631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340133 + ... + 665930.

It is an arithmetic number, because the mean of its divisors is an integer number (11408765760).

Almost surely, 2^163886656637 is an apocalyptic number.

It is an amenable number.

163886656637 is a deficient number, since it is larger than the sum of its proper divisors (18653595523).

163886656637 is a wasteful number, since it uses less digits than its factorization.

163886656637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006384.

The product of its digits is 156764160, while the sum is 65.

The spelling of 163886656637 in words is "one hundred sixty-three billion, eight hundred eighty-six million, six hundred fifty-six thousand, six hundred thirty-seven".